There is a possibility to weld carbon steel plates with thickness up to 12 mm by using solar energy source instead of electrical energy source. There is a stable arc length and smooth welding process with low welding smoke can be obtained in case of using solar energy source.
[pdf] Capacitor Discharge Welding works based on the principle of discharging stored electrical energy from capacitors through the workpieces to create a weld. The capacitors store a high voltage charge, which is discharged through the weld zone, generating an intense current flow for a short duration.
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